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Ex 2.5, 2 (i) - Chapter 2 Class 9 Polynomials (Term 2)

Last updated at Aug. 25, 2021 by

Ex 2.5,2 - Evaluate the products without multiplying directly - Ex 2.5

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Ex 2.5, 2 Evaluate the following products without multiplying directly: 103 107 103 107 = (100 + 3) (100 + 7) Using Identity (x + a) (x + b) = x2 + (a + b)x + ab, where x = 100 , a = 3, b = 7, = (100)2 + (3 + 7) 100 + (3) (7) = 10000 + (10)(100) + 21 = 10000 + 1000 + 21 = 11021

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